1. Northwestern Memorial Hospital, Chicago, IL;
2. Dana–Farber Cancer Institute, Malden, MA;
3. Albert Einstein Medical Center, Philadelphia, PA;
4. Fox Chase Cancer Center, Philadelphia, PA;
5. Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL;
6. McGill University, Jewish General Hospital Segal Cancer Centre, Montréal, QC, Canada;
7. Brigham and Women's Hospital and Dana-Farber Cancer Institute, Boston, MA;
8. NRG Oncology, and The Allegheny Health Network Cancer Institute, Pittsburgh, PA;
9. Mayo Clinic, Phoenix, AZ;
10. Swedish Medical Center, Seattle, WA;
11. NSABP Foundation and Peggy and Charles Stephenson Oklahoma Cancer Center, Oklahoma City, OK;
12. Montefiore Medical Center/Albert Einstein College of Medicine/Albert Einstein Cancer Center, Bronx, NY;
13. University of Texas MD Anderson Cancer Center, Houston, TX;
14. St. Luke's-Roosevelt Hospital, Effingham, IL;
15. Northwestern University Division of Hematology/Oncology, Chicago, IL;
16. University Hospitals Case Medical Center, Cleveland, OH;
17. Indiana University School of Medicine, Indianapolis, IN;
18. University of Wisconsin Carbone Cancer Center, Madison, WI;
19. Wake Forest University Health Sciences, Winston Salem, NC;
20. Stanford University School of Medicine, Stanford, CA;